Question

Resolva As Equações

a) -3 ( X - 5 ) - 2 ( 2x + 1 ) = 8

b) 4• ( X + 3 ) = 2X + 22

c) X + 2 ( X + 3 ) = 69

d) 2 ( X + 1 ) + 2 • 5 = 38

Answer 1

a)-3(x-5)-2(2x+1)=8
-3x+15-4x+2=8
-7x+13=8
-7x=-5(-1)
x=5/7

b)4. (x+3)= 2x +22
 4x + 12 = 2x + 22
 4x - 2x = 22 -12
2x = 10
x = 5

c) x+2(x+3)=69
x2 +3x+2x+6=69
x2+5x-63=0
delta= b2 - 4.a.c
delta=25 + 252
delta= 277

d) 2 (x+1) + 2 . 5= 38
2x +2+2.5=38
2x+2+10=38
2x=38-12
2x=26
x=13

Espero ter te ajudado (e que esteja certo :) )